Anthraquinone dyes and dye intermediates



quino e dyes and tag of .Orlonacrylic fibers.

United States Patent ANTHRAQUINONE DYES AND DYE INTERMEDlATES Samuel N. Boyd, Jr., Salem, N. J., assignor to E. I. du Pont de Nemours and Company, Wilmington, DeL, a corporation of Delaware No Drawing. Application October), 1953,

Serial 'No. 885 393 6 0 Claims. (Cl. 2 60-.-326) This invention relates to the preparation of anthro dye intermediates, and more particularly to the preparation of .N-substituted 1,4-diamino-2,3.- anthraquino'ne dicarboximides which may also be re- ;terred to as ;2-(amino alkyl)-4,1.1=diaminoanthra [2,3-cl- .pyrr0l-31-3 ,5, IO-tetrones.

it is an object of this invention to produce blue dyes particularly S itable for application to cellulose acetate fibers and to Dacron polyester fibers which will exhibit satisfactory general fastness properties, particularly to li ht, ashing a d fumesthe invention to provide blue dyes which have improved It is a further object of allinity for cellulose acetate fibers and Dacron polyester fibers and which .will therefore build-up in deeper shades than do the corresponding 1,4-diaminoanthraquinone dicarboximides which do not conta n the novel substituents on the :irnide nitrogen more part cularly -d1sclosed in this application. 'It is a still further object of this invention to provide intermediates for the preparation of new cationic dyes, particularly su1ted to the dye- The compounds of the present invention have the general formula:

in which R stands for a radical ofthegroup and R1 stands for substituents of the group =H, 'CH3, -C2H5, CH-2-C,Hz-I-OH and --.CH2 -CH2NH2 but where one R1 stands for one of the groups the remaining R1 stands for hydrogen.

The following examples are given to illustrate the invention. The par-ts used are by weight, unless otherwise designated.

Example 1 r 2,701,802 [Ce 7 p nted Feb. 8, 1955 i0 N is. obtained, having .a melting .point above (400" (1. and .a

nitrogen analysis of 13.5%. This compound dyes cellulose acetate fiber and pplyethylene terephthalate fiber ifn greenish-blue shades with excellent light and wash astness.

Example 2 A mixture of .46 parts of -1,4=diamino -r2,'3-anthraquinone dicarboximlde, 28 parts of Lidiaminopropane and 235 parts .of ortho=dichlorobenzene -is heated with stirring for 4 hours at 1 15* The product is isolated by the method .of Example 1, giving a yield of 48 parts (89% of thetheoretieal). 'Ithasthe formula:

|O NH:

Nomhumn O NHz a meltipg point of 235 C. and a nitrogen analysis of 14.4%. This 'cornpounddyes eellulose acetate fiber and polyethylene terephthalate fiber in ,bright greenish-blue shades with excellent light and wash" fast ness.

Example 3 A mixture of 46 parts oi 1 ,4= diamino-2,3-anthraquinone dicarboxirnide, 34 parts of 1,3-diamino-2-propan0l and 168 parts of-Cello'solve is heated for 3 hours at 129 and he pr uct 51's iso ed y t m t o o Example 1. The yield is 42 parts (73% of the theoretical) of the compound of the-formula;

havinga melting point of 292 C. and a nitrogen analysis of 14.4%. The compound dyes cellulose acetate fiber and polyethylene terphthalate fiber a bright greenishblue shade with excellent light and wash ,fastness.

Example 4 mi tue of 6 p t of .lAa aminoez an hraq one dcarboxi nideand .33 pan at m thylethylene damine is heated in 168 parts of nitrobenzene for one hour at -l l0 C. and for an additiontal 7 hours a v 2t C. Afte c ol g at room temp tu e, t e mass is filtered and he filt reake washed with m tha olethen w a e a d drie .A yie s of 5% of theory of the 1,4-diamino-N-(Z-dimethylaminoethyl)e 2,3-anthraquinoue dicarboximide of the following formula:

N m mmen, C O

i o n w ha ni o e analysis of 1113-5 '2 It y el u acetate fi r n po yethyleneterephthal ts fiber "in bright greenish-blue shades of excellentlght wash fastness.

fastness.

Example washed with methanol, then with water, and dried. A

yield of 85% of theory of .the 1,4-diamino-l 1-(Z-diethylaminoethyl)-2,3-anthraquinone dicarboximide 1s obtained having a nitrogen analysis of 14.5%. Th1s product dyes cellulose acetate and polyethylene terephthalate .rfibers in bright greenish-blue shades of excellent light and washfastness properties. 1

Example 6 A mixture of 46 parts of 1,4-diamino-2,3-anthraquinone dicarboximide and 39 parts of N-(2-hydroxyethyl)-ethylene diamine is heated in 168 parts of Cellosolve while stlrring for one hour at 105-1l0 C. and 1-thereafter heated for 7 hours at 115120 After cooling to room temperature, the reaction mass 1s filtered and the filter cake is washed with methanol, then with .water and dried. A yield of 88% of theory of the 1,4

diamino N (2 hydroxyethylaminoethyl)-2,3-anthraquinone dicarboximide of the formula:

is obtained having a melting point of 215 C. and a nitrogen analysis of 13.8%. This product dyes cellulose acetate fiber and polyethylene terephthalate fiber in bright greenish-blue shades having excellent light and wash Example 7 A mixture of 46 parts of 1,4-diarnino-2,3-anthraquinone dicarboximide-and 39 parts of diethylene tri- Qarnine is heated in 168 parts of Cellosolve with stirring for one hour at 105-110'C., and then for ,7 hours at 115-120 C. After cooling to room temperature,

the reaction mass is filtered and the filter cake washed with methanol, then with water and dried. A yield of 72% of theory of the 1,4-diainino-N-(Z-aminoethylaminoethyl)-2,3-anthraquinone dicarboximide of the formula':" v

O NH:

is obtained. This compound dyes cellulose acetate fiber 'and polyethylene terephthalate fiber in bright greenishblue shades having excellent light and wash fastness.

Example 8 oH2cmoH=NHcmomon is obtained having a melting point of 215 C. and a nitrogen; analysis of. 13.2%. This compound dyes cel- 'lulose acetatev fiber and polyethylene terephthalate fiber in ,bright greenish-blue l shades having excellent light and Wa SHfaSlIl SS. .1

4 Example 9 When 38 parts of N,N-dimethyl-1,3-propane diamine is substituted for the ethylene diamine in Example 1 and the reaction mass is heated for 5 hours at l00 C., a yield of 82% theory of the product having the formula:

0 NH: H

i 1 TH2 is obtained having a melting point of 214 C. and a nitrogen analysis of 14.1%. This compound dyes cellulose acetate fiber and polyethylene terephthalates fiber in bright greenish-blue shades having excellent light and wash fastness properties.

While in the examples the solvents Cellosolve, orthodichlorobenzene and nitrobenzene are employed, any inert organic solvent having a boiling point in the region of the reaction temperature may be substituted, e. g. toluene, the xylenes, monochlorobenzene, nitrochlorobenzenes, trichlorobenzenes, butyl alcohol, methyl Cellosolve (Z-methoxy-ethanol) and ethylene glycol.

The temperatures preferably employed range from 95 to 0, although these temperatures are not critical and higher or lower temperatures may be used. Below about 80 C. the reaction is very slow. At very high temperatures the aliphatic amine apparently reacts with the primary amino groups in the anthraquinone alphapositions to split oflf NHs, and red impurities tend to be formed.

The products of this invention are particularly useful as dispersion dyes for cellulose acetate and Dacron polyester fibers, and as intermediates in the preparation of new dyes more particularly disclosed in co-pending application Serial No. 385,302 filed of even date here- These products when used as dispersed dyes may be used individually or mixed with other dyes of the same type, or with dyes such as disclosed in U. S. Patent 2,628,963 to produce colors having excellent build-up properties. The compounds of this application when used as dispersed dyes have outsanding gas fume fastness on Dacron polyester fiber, and more particularly on cellulose acetate fiber. The gas fume fastness of the colors of this application are much improved over the compounds of similar shade disclosed in U. S, Patent 2,050,662, since'the new colors fade only slightly upon exposure and then toward green as distinguished from those of the patent above mentioned, which fade toward the red shade. The light fastness of the dyes of this application on cellulose acetate range from 5 to 6 and on Dacron polyester fiber from 7 to 8, using the standard fastness scale.

I claim:

1. Compounds of the formula:

(I) NH:

O NH2 in which R stands for a radical of the group -CH2H5, CH2CH2OH and -CH2CH2NH2: but Where one R1 stands for one of the group the remaining R1 stands for hydrogen.

2. The compound of the formula:

CHI

O NH: 4. The compound of the formula:

(I? NH:

NCHaCHlN(CH|)a CO 5. The compound of the formula:

6. The compound of the formula:

No references cited. 

1. COMPOUNDS OF THE FORRMULA: 